An injury causing disruption of the axon and myelin sheath of a nerve. It results from degeneration of the axon distal to the point of injury, but regeneration is usually spontaneous.
Damage to nerve cells that destroys the axons but that does not destroy the supporting structures of the cells, making regeneration possible.
Nerve injury characterized by disruption of the axon and myelin sheath but with preservation of the connective tissue fragments, resulting in degeneration of the axon distal to the injury site; regeneration of the axon is spontaneous and of good quality.